exchange 2007 and exchange 2013 coexistence issue with outlook any where

Hi,
we have exchange 2007 sp3 with latest rollup and we have recently installed the Exchange 2013 server with cu 11. I am able to use the webmail to login into the mailboxes. but I could not able to configure the mail boxes in outlook I am getting error"This action cannot be completed the connection to Microsoft exchange is unviable.

Here is my outlook anywhere settings

VERBOSE: Connected to INHYSINMAIL2.comakeit.in.
[PS] C:\Windows\system32>get-OutlookAnywhere

ServerName                         : INHYVSINMAIL1
SSLOffloading                      : True
ExternalHostname                   : webmail.comakeit.in
InternalHostname                   :
ExternalClientAuthenticationMethod : Basic
InternalClientAuthenticationMethod : Ntlm
IISAuthenticationMethods           : {Basic, Ntlm}
XropUrl                            :
ExternalClientsRequireSsl          : True
InternalClientsRequireSsl          : False
MetabasePath                       : IIS://INHYVSINMAIL1.comakeit.in/W3SVC/1/ROOT/Rpc
Path                               : C:\Windows\System32\RpcProxy
ExtendedProtectionTokenChecking    : None
ExtendedProtectionFlags            : {}
ExtendedProtectionSPNList          : {}
AdminDisplayVersion                : Version 8.3 (Build 83.6)
Server                             : INHYVSINMAIL1
AdminDisplayName                   :
ExchangeVersion                    : 0.1 (8.0.535.0)
Name                               : Rpc (Default Web Site)
Id                                 : INHYVSINMAIL1\Rpc (Default Web Site)
OriginatingServer                  : INHYSINDC.comakeit.in
IsValid                            : True
ObjectState                        : Changed

Exchange 2013 server
ServerName                         : INHYSINMAIL2
SSLOffloading                      : True
ExternalHostname                   : webmail.comakeit.in
InternalHostname                   : webmail.comakeit.in
ExternalClientAuthenticationMethod : Basic
InternalClientAuthenticationMethod : Ntlm
IISAuthenticationMethods           : {Basic, Ntlm, Negotiate}
XropUrl                            :
ExternalClientsRequireSsl          : True
InternalClientsRequireSsl          : True
MetabasePath                       : IIS://INHYSINMAIL2.comakeit.in/W3SVC/1/ROOT/Rpc
Path                               : C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\rpc
ExtendedProtectionTokenChecking    : None
ExtendedProtectionFlags            : {}
ExtendedProtectionSPNList          : {}
AdminDisplayVersion                : Version 15.0 (Build 1130.7)
Server                             : INHYSINMAIL2
AdminDisplayName                   :
ExchangeVersion                    : 0.20 (15.0.0.0)
Name                               : Rpc (Default Web Site)
DistinguishedName                  : CN=Rpc (Default Web
                                       Site),CN=HTTP,CN=Protocols,CN=INHYSINMAIL2,CN=Servers,CN=Exchange Administrative
                                       Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=coMakeIT-IN,CN=Microsoft
                                       Exchange,CN=Services,CN=Configuration,DC=comakeit,DC=in
Identity                           : INHYSINMAIL2\Rpc (Default Web Site)